Numerical instability in PIC simulations of weakly collisional magnetized plasmas

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F15%3A00230932" target="_blank" >RIV/68407700:21230/15:00230932 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Numerical instability in PIC simulations of weakly collisional magnetized plasmas

Popis výsledku v původním jazyce

Stability of weakly collisional magnetized plasma in the ExB fields is studied with Particle-In-Cell simulations. In addition to the physical instability that was expected from theoretical considerations, numerical instability has been identified. The simulation stability is usually related to the resolution of the Debye length. However, the observed numerical instability is likely due to the low resolution of the electron Larmor radius (i.e. for grid spacing being larger than the Larmor radius but smaller than Debye length). The effect of the instability is the plasma filamentation, and large growth rate of potential fluctuations even for the physically stable cases.

Název v anglickém jazyce

Numerical instability in PIC simulations of weakly collisional magnetized plasmas

Popis výsledku anglicky

Stability of weakly collisional magnetized plasma in the ExB fields is studied with Particle-In-Cell simulations. In addition to the physical instability that was expected from theoretical considerations, numerical instability has been identified. The simulation stability is usually related to the resolution of the Debye length. However, the observed numerical instability is likely due to the low resolution of the electron Larmor radius (i.e. for grid spacing being larger than the Larmor radius but smaller than Debye length). The effect of the instability is the plasma filamentation, and large growth rate of potential fluctuations even for the physically stable cases.

Druh

O - Ostatní výsledky

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů